Improvement in steam-engines



A. A. E. LISSIGNOL.

STEAM-ENGINES.

. JAMES R DSGOOD 8c CO BOSTON UNITED STATES PATENT OFFICE.

A. A. EMMANUEL LISSIGNOL, OF BRUSSELS, BELGIUM, ASSIGNOR TO HENRY G. HAUTERMAN N, PRESIDENT OF THE SOCIETE OF SAME PLACE.

ANONYME LE PROGRES,

IMPROVEMENT IN STEAM-ENGINES.

Specification forming part of Letters Patent No. 183,182, dated October 10, 1876; application filed April 3, 1876.

e ing drawing, in Which- Figure 1 is a longitudinal section ofthe cylinder and steam-chest of a steam-engine with my improvements, and Fig. 2 a transverse section of the slide-valve.

A is the cylinder ot' the steam-engine, a a being the steam-ports, and a the exhaust-port. These parts, with the piston B, steam-chest E, and cut-otivalve D, are of the usual construction. The slide-valve F, however, which constitutes the main part of' my improvement, I construct in the following manner: The exhaust steam passing to the exhaust-port, being of a lower temperature than the fresh steam on the other side of the slide-valve of the steam-engine as ordinarily constructed, tends to lower the temperature of this fresh steam, and consequently produce condensation. In order to prevent this, I make the slidevalve double, and the space between its wallsff I fill with charcoal or other non-conducting material, which is inserted through openings closed by the covers e e, the edges of the latter being sealed by plastic material.

I claim as my invention- The Within-described slide-valve, consisting of the Walls f f and detachable covers e e, the Whole being arranged for the reception of a non-conducting substance, as set forth.

A. A. EML. LISSIGNOL.

Witnesses:

P. VANUEBERG, A. VANDERsTEER. 

